18654860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{227}}^1\times {\mathrm{587}}^1$

素因数の和:830

約数の個数: 48

約数和(自身を含む): 45045504

約数和(自身を除く): 26390644

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 227, 454, 587, 908, 1135, 1174, 1589, 2270, 2348, 2935, 3178, 4109, 4540, 5870, 6356, 7945, 8218, 11740, 15890, 16436, 20545, 31780, 41090, 82180, 133249, 266498, 532996, 666245, 932743, 1332490, 1865486, 2664980, 3730972, 4663715, 9327430, 18654860]

約数ペア:

[(1, 18654860), (2, 9327430), (4, 4663715), (5, 3730972), (7, 2664980), (10, 1865486), (14, 1332490), (20, 932743), (28, 666245), (35, 532996), (70, 266498), (140, 133249), (227, 82180), (454, 41090), (587, 31780), (908, 20545), (1135, 16436), (1174, 15890), (1589, 11740), (2270, 8218), (2348, 7945), (2935, 6356), (3178, 5870), (4109, 4540)]